91930130478 has 48 divisors (see below), whose sum is σ = 210962378016. Its totient is φ = 28832094720.

The previous prime is 91930130443. The next prime is 91930130483. The reversal of 91930130478 is 87403103919.

91930130478 is a `hidden beast` number, since 9 + 19 + 30 + 130 + 478 = 666.

It is a super-2 number, since 2×91930130478² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006743 + ... + 1094253.

It is an arithmetic number, because the mean of its divisors is an integer number (4395049542).

Almost surely, 2^91930130478 is an apocalyptic number.

91930130478 is an abundant number, since it is smaller than the sum of its proper divisors (119032247538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91930130478 is a wasteful number, since it uses less digits than its factorization.

91930130478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90969 (or 90966 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 91930130478 in words is "ninety-one billion, nine hundred thirty million, one hundred thirty thousand, four hundred seventy-eight".